| ??? 11/27/04 19:57 Read: times |
#82094 - 20.000, not 2000. Responding to: ???'s previous message |
excuse me, my mistake. 20ms = 20.000 microseconds, not 2000. That's 20.000 instruction cycles. With decent programming in ASM you can get a simple PID under 0.1ms. 20ms should work even with quite flaky C code of prety advanced variation.
Of course if that's not enough, you may get a faster '51 derivative, use a DSP instead, or do everything in one cycle on FPGA. |
| Topic | Author | Date |
| help about pid | 01/01/70 00:00 | |
| Floating point? | 01/01/70 00:00 | |
| Keil floating-point performance | 01/01/70 00:00 | |
| Search the forum | 01/01/70 00:00 | |
| Floating Point Vs Mixed point | 01/01/70 00:00 | |
| You mean Fixed Point | 01/01/70 00:00 | |
| Mixed not Fixed | 01/01/70 00:00 | |
| Warnings about Floating Point | 01/01/70 00:00 | |
| Shortcuts | 01/01/70 00:00 | |
| Implied aka Fixed point | 01/01/70 00:00 | |
| Another Shortcut | 01/01/70 00:00 | |
| Answering the question | 01/01/70 00:00 | |
| Autotunning? | 01/01/70 00:00 | |
| PID Tricks and Tuning | 01/01/70 00:00 | |
| Great Stuff ! | 01/01/70 00:00 | |
| I followed your idea... | 01/01/70 00:00 | |
| Another couple tricks | 01/01/70 00:00 | |
| tests | 01/01/70 00:00 | |
limit cycle tuning | 01/01/70 00:00 | |
| PID to control a Peltier | 01/01/70 00:00 | |
| An idea to try | 01/01/70 00:00 | |
| very fast 20ms ??? | 01/01/70 00:00 | |
| 20.000, not 2000. | 01/01/70 00:00 | |
| very fast 20ms ??? | 01/01/70 00:00 | |
| in points... | 01/01/70 00:00 |